If you can follow only one bit of data, follow the earnings - assuming the company in question has earnings. I subscribe to the crusty notion that sooner or later earnings make or break an investment in equities. What the stock price does today, tomorrow, or next week is only a distraction.

One Up On Wall Street: How To Use What You Already Know To Make Money In (ed. Simon and Schuster, 2012) - ISBN: 9781439126158